A rectangular loop of wire is placed in a uniform magnetic field directed into the page. The loop is then rotated 90° about an axis parallel to the field lines. Which of the following statements best describes the induced current in the loop during this rotation?

Core Concept

According to Faraday's law, an emf is induced in a loop when there is a change in magnetic flux through the loop. During the rotation, the magnetic flux changes because the angle between the normal to the loop and the magnetic field changes. The direction of the induced current is given by Lenz's law, which states that the induced current will oppose the change in flux. However, without knowing the direction of rotation (clockwise or counterclockwise), we cannot determine the direction of the induced current.